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Sigma-Aldrich

Mercury(II) iodide

ACS reagent, ≥99.0%

Synonym(s):

Mercuric iodide red

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About This Item

Linear Formula:
HgI2
CAS Number:
7774-29-0
Molecular Weight:
454.40
EC Number:
231-873-8
MDL number:
MFCD00011044
UNSPSC Code:
12352302
PubChem Substance ID:
329752248
NACRES:
NA.21
grade:
ACS reagent
form:
powder
solubility:
potassium iodide solution: passes test
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grade

ACS reagent

Quality Level

200

Assay

≥99.0%

form

powder

reaction suitability

reagent type: catalyst
core: mercury

impurities

≤0.05% soluble Hg salts

bp

354 °C (lit.)

mp

259 °C (lit.)

solubility

potassium iodide solution: passes test

cation traces

Hg+: ≤0.1%

SMILES string

I[Hg]I

InChI

1S/Hg.2HI/h;2*1H/q+2;;/p-2

InChI key

YFDLHELOZYVNJE-UHFFFAOYSA-L

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General description

Red mercuric oxide possesses the ability to detect high energy radiation (X- and γ-rays) and is used in nuclear radiation detectors.[1][2]

Application

Mercury(II) iodide may be used in the preparation of the following:
  • mercury(II) acetate[3]
  • di­iodo­bis(1-methyl-1,3-imidazolium-2-thiol­ato-S)­mercury(II)[4]
  • [Hg2(L)(I)4] and [(L′)Hg(μ-I)2HgI2]n (L = N, N′-bis(phenyl(pyridin-2-yl)methylene)propane-1,2-diamine, L′ = N-(phenyl(pyridin-2-yl)methylene)propane-1,2-diamine)[5]

Signal Word

Danger

Hazard Classifications

Acute Tox. 1 Dermal - Acute Tox. 2 Inhalation - Acute Tox. 2 Oral - Aquatic Acute 1 - Aquatic Chronic 1 - STOT RE 2

Storage Class Code

6.1A - Combustible acute toxic Cat. 1 and 2 / very toxic hazardous materials

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Regulatory Listings

Regulatory Listings are mainly provided for chemical products. Only limited information can be provided here for non-chemical products. No entry means none of the components are listed. It is the user’s obligation to ensure the safe and legal use of the product.

EU REACH Annex XVII (Restriction List)

CAS No.

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Certificates of Analysis (COA)

Lot/Batch Number
STBL1944
STBK8897
STBK6039
STBJ9459
STBJ2628

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Syntheses, Characterization, and Crystal Structures of a Dinuclear Complex and Coordination Polymer of Mercury (II) with Schiff Base Ligands containing N3 and N4 Donors.
Abedi M, et al.
Zeitschrift fur Anorganische und Allgemeine Chemie, 640(11), 2193-2197 (2014)
Preliminary results on mercuric iodide nuclear radiation detectors.
Ponpon JP, et al.
Nuclear Instruments and Methods in Physics Research, 119, 197-198 (1974)
Mercuric iodide for room temperature radiation detectors. Synthesis, purification, crystal growth and defect formation.
Piechotka M.
Materials Science & Engineering. R, Reports : A Review Journal, 18(1), 1-98 (1997)
Diiodobis (1-methyl-1, 3-imidazolium-2-thiolato-S) mercury (II).
Pavlovic G, et al.
Acta Crystallographica Section C, Crystal Structure Communications, 56(7), 801-803 (2000)
Eagleson M.
Concise Encyclopedia Chemistry, 637-637 (1994)
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Questions

1–2 of 2 Questions  

  1. How is shipping temperature determined? And how is it related to the product storage temperature?

    1 answer

    1. Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf

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  2. How can I determine the shelf life / expiration / retest date of this product?

    1 answer

    1. If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
      For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
      For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
      For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/449/386/product-dating-information-mk.pdf

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